题目内容
下面各题怎样简便怎样算(求未知数X).
| 4.02-1.36-2.64 | (1-
|
| X:
| (
|
(1)4.02-1.36-2.64,
=4.02-(1.36+2.64),
=4.02-4,
=0.02;
(2)(1-
| 6 |
| 7 |
| 7 |
| 3 |
| 3 |
| 7 |
=
| 1 |
| 7 |
| 7 |
| 3 |
| 3 |
| 7 |
=
| 1 |
| 7 |
| 3 |
| 7 |
| 3 |
| 7 |
=
| 9 |
| 343 |
(3)
| 5 |
| 14 |
| 9 |
| 14 |
| 4 |
| 9 |
=
| 5 |
| 14 |
| 9 |
| 14 |
| 4 |
| 9 |
=1-
| 4 |
| 9 |
=
| 5 |
| 9 |
(4)X:
| 3 |
| 4 |
| 2 |
| 5 |
| 10 |
| 3 |
| 10 |
| 3 |
| 3 |
| 4 |
| 2 |
| 5 |
| 10 |
| 3 |
| 3 |
| 10 |
| 10 |
| 3 |
| 10 |
| 3 |
| 3 |
| 10 |
| 10 |
| 3 |
X=
| 9 |
| 100 |
(5)(
| 3 |
| 4 |
| 1 |
| 25 |
=(
| 1 |
| 4 |
| 1 |
| 25 |
=0.05×
| 1 |
| 25 |
=0.002.
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